A spir zidaShaft ndiye gawo lofunikira kwambiri ndikugwirizanitsa kwambiri pamakina omanga, omwe amatha kuzindikira mayendedwe ozungulira ndi zinthu zina, ndipo amatha kufalitsa utoto ndi mphamvu mtunda wautali. Ili ndi maubwino operekera magazi kwambiri, moyo wautali ndi kapangidwe kake. Zagwiritsidwa ntchito kwambiri ndipo yakhala imodzi mwazinthu zoyambira kumanga makina. Pakadali pano, ndi kukula kwachuma kwachuma ndi kufulumira kwa zomangamanga, padzakhala kukufunirani watsopano kwa makina omanga. Kusankha kwa zida za zidamgodi,Njira yochizira kutentha, kuyika ndi kusintha kwa njira yopangira makina, njira zopumira, ndipo chakudyacho ndichofunikira kwambiri pakukonzekera bwino komanso moyo wa shaft.